Book/Report

FZJ-2019-04537

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Untersuchung der radialen Verteilung der leichten Verunreinigung Neon im Kern von TEXTOR-94 mittels röntgenspektroskopischer Methoden

Krakor, T. (Corresponding author)FZJ*

1998
Forschungszentrum Jülich, Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/22636

Report No.: Juel-3595

Abstract: In tokamak plasma experiments with radiation cooling, impurity ions are seeded to influence and to cool the plasma edge. These particles penetrate into the plasma centre but their transport is not yet understood. A Bragg spectrometer has been built ancl absolutely calibrated for density measurements of the light impurity neon in the plasma core of TEXTOR-94. By means of the movable spectrometer, the emission of the Lyman-$\alpha$ line of hydrogen-like neon ions and of the resonance line of helium-like neon ions was detected along several directions. From these radially resolved emission profiles, the radial density distributions of hydrogen- and helium-like neon ions were derived. The good agreement of the density profiles obtained from charge exchange spectroscopy with these measurements proves that charge exchange spectroscopy is a reliable diagnostic for neon density measurements. The further comparison of measured density profiles with the results from the numerical transport code RITM demonstrates that this model reliably predicts the transport properties and the densities of light impurities in the plasma centre of tokamaks.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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